Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d736c8ad190a18e…

MALICIOUS

PDF

78.1 KB Created: 2021-07-06 13:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a20186a0c4a2071005ce1041ce31adb6 SHA-1: e4249df2b2e8e4ea89a55cb1c02e1945393eced1 SHA-256: 0d736c8ad190a18e5790d27e8c7997fc7d626a42c2f338a5f4f6d7546b0fb7df
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised WordPress upload directories, suggesting it is part of a link farm designed to distribute malware. The presence of a 'download button' lure further supports a phishing or malicious download campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nomylo.ru/uplcv?utm_term=xdizzle+sample+pack+free+download PDF link annotation
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c481fcb57f2---gufupuzilaliwimuwe.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/8qoddg3delngrir5re6bd5881v/71958484170.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40732212422.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/tevefenapitozetivuwepam.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/1c3b137986bddbad3507a9996af5f170/25229362534.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/deruveko.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/945fc3c43c03e8ae444fa3cee279bd76/27400498320.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb383712f82---69231618152.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/76529324794.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/16816952256.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a93f8744395---lisefivoxonigojadopom.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa473744ac9---tizedejejipakof.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac8ba6077a---85214206692.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/levabibudoguzemewesabalo.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/gomibonexul.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/7pf5gqtqce7fv2lhjro4j6qkb2/zuliresonizilijuve.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/9748d13fe981031ebac7d63a4f6f4fe6/saxorinagibafoxe.pdfIn PDF document text
    • http://aimic.com/userfiles/file/xogifati.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/3fe0c8c36117c3e11ec5be707f3c1b82/71993202286.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/87703256277.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609293fbe9847---80085299936.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160804a1fc4fe8---visixupufebatavuwe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB92 17616 bytes
SHA-256: b74f5b625a899533e3dfea696e42b038608961cd58d49682b2e34bf74f5194ce
font_01_sfnt_off0000f9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E0 10928 bytes
SHA-256: 0f7b237fe49387e99cc7f70e6b2984fa148dab1a03b3f7ac5bfdb4333c600924
font_02_sfnt_off0001133c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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